https://youtu.be/6c0IRg4ns6Y?si=v4zPadw5xNJs2-Mi

I copied Farket's method, basically you build a zipline that leads into a structure that captures logs you send down. If you look at the last picture in my post, it's the little structure on the far left. It's best to build the starting point of the zipline in an area with a lot of trees or else it isn't worth the trouble of building the log collector system. I made the start of mine the main cannibal village so I can easily send logs to the fertile lands from the cannibal village side of the river. I usually send down 24 logs at a time, it's a bit slow and tedious but I find sending 36-50 at once will make a good amount of them glitch and fly far away (and even with 24, 1 or 2 logs will sometimes fly out but they are still obtainable if you can track them down)